Detailed measurements of radioisotopes in deep-sea deposits, plus modelling of how they reached Earth, indicate that many supernovae have occurred near enough to have potentially influenced evolution. See Letters p.69 & p.73
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Melott, A. Supernovae in the neighbourhood. Nature 532, 40–41 (2016). https://doi.org/10.1038/532040a
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DOI: https://doi.org/10.1038/532040a
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